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2. REQUIRED PARTS & EQUIPMENT
2.1 Spacer, junction box, supply lead and caution sign
When it is necessary to loosen the heating wire from the mesh, the plastics strips (Model EM2-SPACER-PL) will help maintain the correct
spacing 3" (7.6 cm). For asphalt layer the metal spacer (Model HARD-SPACER-GALV-25MM-25M) should be used. Extension of the cold leads
needs to be done in a junction box. The connection between the control panel and the junction box is made by a suitable supply lead.
For installation in asphalt, the sensor cables must be protected by a metal conduit pipe or be laid under the asphalt layer in the substrate
underneath. The conduit pipe is sealed at the end so the asphalt cannot seep in. Ensure that the heating wire and the splice and end seal
terminations are completely enveloped by the asphalt without air pockets. Allow asphalt to cool to temperature of 212°F (100°C) or lower
before pouring it within 30" (76 cm) of the terminations. This work needs to be done before the asphalt pouring of the entire surface will be
executed.
Minimum one snow melt caution sign (Model SMCS or SMCS-CF) should be used per system.
2.2 Controller and Sensors
nVent offers control units specially designed for the surface snow melting application. Some incorporate combined temperature and
moisture sensors to ensure efficient operation of the system.
Catalog #
Description
EC-TS
Adjustable electronic thermostat for ambient, pipe, or slab sensing
PD-PRO
Automatic snow- & ice-melting controller for use with Snow Owl, GIT-1 and SIT-6E sensors (sold separately)
GF-PRO
Automatic snow- & ice-melting controller with GFEP for use with Snow Owl, GIT-1 and SIT-6E sensors (sold separately)
RCU-3
Remote control for use with PD-Pro, APS-3C or EUR-5A
RCU-4
Remote control for use with GF-Pro, APS-4C or SC-40C
LCD-8
Aerial snow switch
Snow Owl Sensor
Snow Owl Aerial Snow Sensor (for use with PD-PRO or GF-PRO)
SIT-6E
Pavement-mounted snow sensor
2.3 Conduits
Minimum 3/4" diameter conduits (not included) are required to protect the cold lead and the sensor connection lead.
2.4 Ground Fault Protection
Use circuit breakers that incorporate 30-mA ground-fault circuit protection, or provide equivalent levels of ground-fault protection. To
minimize the danger of fire from sustained electrical arcing if the heating wire is damaged or improperly installed, and to comply with the
requirements of nVent agency certifications, and national electrical codes, ground-fault equipment protection must be used on each heating
cable branch circuit. Arcing may not be stopped by conventional circuit protection.
2.5 Storage of WinterGard Mesh
Storage temperature range: -40°F to 113°F (-40°C to 45°C). Store all system elements in a clean, dry place.
2.6 Test equipment
•
Ohmmeter
•
2500 Vdc megohmeter
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